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one
产生右图所示图像f1(m,n)，其中图像大小为256×256，中间亮条为128
×32，暗处=0，亮处=100。对其进行FFT：
① 同屏显示原图f1(m,n)和FFT(f1)的幅度谱图；
② 若令f2(m,n)=（-1）m+n f1(m,n)，重复以上过程，比较二者幅度
谱的异同，简述理由；
③ 若将f2(m,n)顺时针旋转90 度得到f3(m,n)，试显示FFT(f3)的幅
度谱，并与FFT(f2)的幅度谱进行比较；
④ 若将f1(m,n) 顺时针旋转90 度得到f4(m,n)，令f5(m,n)=f1(m,n)+f4(m,n)，试显
示FFT(f5)的幅度谱，并指出其与FFT(f1)和FFT(f4)的关系；
⑤ 若令f6(m,n)=f2(m,n)+f3(m,n)，试显示FFT(f6)的幅度谱，并指出其与FFT(f2)和
FFT(f3)的关系，比较FFT(f6)和FFT(f5)的幅度谱。(Generating an image f1 (m, n) shown in the figure, wherein the image size is 256 256, the intermediate light bar 128 32 0 = dark, bright Department 100. Its FFT: ① screen display picture f1 (m, n) and the FFT (f1) of the amplitude spectrum ② If so f2 (m, n) = (-1) m+n f1 (m, n), repeat The above process, comparing the amplitude spectrum of the similarities and differences between the two, brief reasons ③ If f2 (m, n) 90 degrees clockwise to get f3 (m, n), try to display FFT (f3) the amplitude spectrum and with the FFT (f2) comparing the amplitude spectrum ④ If f1 (m, n) obtained by 90 degrees clockwise f4 (m, n), so f5 (m, n) = f1 (m, n)+f4 (m, n ), try to display FFT (f5) amplitude spectrum, and pointed out its relationship with the FFT (f1) and FFT (f4) of ⑤ If so f6 (m, n) = f2 (m, n)+f3 (m, n) and try to display the FFT (f6) amplitude spectrum, and pointed out its relationship with the FFT (f2) and FFT (f3), comparing FFT (f6) and FFT (f5) amplitude spectrum.)
- 2013-11-26 16:24:18下载
- 积分：1
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Statistics-Methods-and-Applications
Statistical Methods and Applications (SMA) is the official Journal of the Italian Statistical Society. This international journal fosters the development of statistical methodology and its applications in biological, demographic, economic, health, physical, social, and other scientific domains. In particular, the journal emphasizes investigations of methodological foundations and methods that have broad applications.
- 2013-12-14 19:26:54下载
- 积分：1
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SVD-EOF
基于matlab,采用SVD方法，对数据进行EOF分解，求得基函数(Based on matlab, using SVD method, the data EOF decomposition, obtained basis functions)
- 2014-02-25 10:47:12下载
- 积分：1
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VLSI-dsp-
说明： vlsl 数字信号处理系统设计，非常好的书适合搞算法的人学习哦(vlsl digital signal processing system design, very good book for people who engage in learning algorithms Oh)
- 2011-02-19 21:13:10下载
- 积分：1
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Matlab_Programming
说明： matlab的一本国外原版书，感觉还可以(matlab abroad of an original book, the feeling can also be)
- 2008-11-07 13:15:14下载
- 积分：1
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L-ev-el-S-e-tM-ethod
该程序汇编水平集拓扑优化的GUI，学者可以通过人机界面进行结构的拓扑优化(lever-set )
- 2014-11-25 16:28:34下载
- 积分：1
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bemd
Description: The function is called upon as follows:
a = bemd(im1)
im1 -> Image
a(:,:,1) => IMF 1
a(:,:,2) => IMF 2
a(:,:,3) => IMF 3
a(:,:,4) => Residu
- 2013-10-02 22:23:45下载
- 积分：1
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kalman
描述了在跟踪物体运动的卡尔曼程序。以及绘制出图像。。(matlab kalman)
- 2013-04-09 10:09:26下载
- 积分：1
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dtcwtPbicubic
dtcwt and bicubic based image resolution enhancement
- 2012-10-02 18:18:33下载
- 积分：1
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Reconstruct_on_of_oversampled_cosine_modulated_fil
本文首先推导出过采样滤波器组精确重构的条件, 由于此时所需的约束条件数比临界采
样时少, 因而可以设计出频域衰减特性更好的滤波器组(This paper is derived through sampling filters of exact reconstruction of conditions, due to time constraints required for critical extraction ratio
When a small sample, so you can design a better frequency filter attenuation characteristics)
- 2010-05-12 21:21:11下载
- 积分：1
